Relationship between copulation duration and sperm transfer in the lizard Anolis sagrei

Richard R. Tokarz

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

I tested the hypothesis that copulation duration and the number of sperm transferred in a copulation are significantly correlated in the lizard Anolis sagrei. I also investigated whether copulation duration and number of sperm transferred in a copulation are affected by when in the breeding season a copulation occurs, by the body masses and snout-to-vent lengths (SVL) of the copulating lizards, and by which hemipenis is used in a copulation. Reproductively active males and females of A. sagrei were collected monthly in the Miami, Florida area from April through July of 1997 and housed in laboratory animal rooms. Two days after capture, males were allowed to copulate with sexually receptive females. I recorded copulation duration and whether the left or right hemipenis was used for each copulation. In addition, I estimated the number of sperm that were transferred to the female's cloaca in a copulation. Copulations by 46 different pairs of males and females were observed. Copulation duration varied significantly with the month of capture, but the estimated number of sperm transferred did not. Neither copulation duration nor estimated number of sperm transferred were significantly correlated with male or female body masses or SVL, or were significantly affected by which hemipenis was used. Copulation duration and the estimated number of sperm transferred in a copulation were not significantly correlated. Thus the hypothesis that copulation duration and sperm transfer are correlated in A. sagrei was not supported.

Original languageEnglish (US)
Pages (from-to)234-241
Number of pages8
JournalHerpetologica
Volume55
Issue number2
StatePublished - Jun 1 1999

Keywords

  • Anolis sagrei
  • Copulation duration
  • Lizard
  • Sperm transfer

ASJC Scopus subject areas

  • Animal Science and Zoology

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